.stage {
  position: relative;
  width: 100%;
  height: 800px;
}

.img-sec {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: #ddd;
}

.controller-nav {
  position: absolute;
  left: 0;
  bottom: 30px;
  z-index: 101;
  width: 100%;
  text-align: center;
}
